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4970000 Method for the biological denitrification of water
PATENT ABSTRACTS advantageously operated as fluidized-bcd processes using supports to immobilize the biomass.
4968612 CONTINUOUS FERMENTATION PROCESS FOR AROMATIC HYDROCARBON BIOCONVERSION Jih-Han Hsieh assigned to Celgene Corporation This invention provides a continuous bioconversion process in which a non-growth toluene substrate is bio-oxidized by a specific microbe mutant strain to accumulated extracellular muconic acid at a bioreactor production rate of at least about 5 grams ofmuconic acid per liter of fermentation medium per hour. Essential features of the invention process include a continuous feed of whole cell-containing fermentation broth from an auxiliary cell growth and enzyme induction fermentation zone into the main fermentation zone, and a purge stream of whole cell-containing fermentation broth from the main fermentation zone.
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497OOOO METHOD FOR THE BIOLOGICAL DENITRIFICATION OF WATER Dieter Eppler, Alwin Eppler, D 7295 Dornstetten, Federal Republic Of Germany The biological denitrification of water is improved in a decisive manner by reducing on the one hand the oxygen content of the water prior to passing it through the denitrification state and, on the other hand, by bringing the water into contact with the denitrification bacteria in a fluidized bed formed by sand the grains of which have been populated intentionally with denitrification bacteria of the species pseudomonas fluorescens. Accordingly, the apparatus for carrying out the method comprises a stage (51) for eliminating oxygen preceding the denitrification reactor (52). If this stage is designed as a degassing stage, the reactor (52) is followed, advantageously, by a decarbonization stage (81).
4968612 CONTINUOUS FERMENTATION PROCESS FOR AROMATIC HYDROCARBON BIOCONVERSION Jih-Han Hsieh assigned to Celgene Corporation This invention provides a continuous bioconversion process in which a non-growth toluene substrate is bio-oxidized by a specific microbe mutant strain to accumulated extracellular muconic acid at a bioreactor production rate of at least about 5 grams ofmuconic acid per liter of fermentation medium per hour. Essential features of the invention process include a continuous feed of whole cell-containing fermentation broth from an auxiliary cell growth and enzyme induction fermentation zone into the main fermentation zone, and a purge stream of whole cell-containing fermentation broth from the main fermentation zone.
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497OOOO METHOD FOR THE BIOLOGICAL DENITRIFICATION OF WATER Dieter Eppler, Alwin Eppler, D 7295 Dornstetten, Federal Republic Of Germany The biological denitrification of water is improved in a decisive manner by reducing on the one hand the oxygen content of the water prior to passing it through the denitrification state and, on the other hand, by bringing the water into contact with the denitrification bacteria in a fluidized bed formed by sand the grains of which have been populated intentionally with denitrification bacteria of the species pseudomonas fluorescens. Accordingly, the apparatus for carrying out the method comprises a stage (51) for eliminating oxygen preceding the denitrification reactor (52). If this stage is designed as a degassing stage, the reactor (52) is followed, advantageously, by a decarbonization stage (81).